diff mbox series

[v7,09/13] net/tcp: define a fallback value for rcv_wnd size

Message ID 20240921034353.1298452-10-mikhail.kshevetskiy@iopsys.eu
State New
Headers show
Series net: tcp: improve tcp support | expand

Commit Message

Mikhail Kshevetskiy Sept. 21, 2024, 3:43 a.m. UTC 
Some driver implements it's own network packet pool, so PKTBUFSRX is zero.
This results in zero-size TCP receive window, so data transfer doesn't
work. Avoid it by setting a reasonable fallback value.

Signed-off-by: Mikhail Kshevetskiy <mikhail.kshevetskiy@iopsys.eu>
Reviewed-by: Simon Glass <sjg@chromium.org>
---
 net/tcp.c | 6 +++++-
 1 file changed, 5 insertions(+), 1 deletion(-)
diff mbox series

Patch

diff --git a/net/tcp.c b/net/tcp.c
index 647454fc064..90f2ee1f5f7 100644
--- a/net/tcp.c
+++ b/net/tcp.c
@@ -36,7 +36,11 @@ 
 #define TCP_SEND_RETRY		3
 #define TCP_SEND_TIMEOUT	2000UL
 #define TCP_RX_INACTIVE_TIMEOUT	30000UL
-#define TCP_RCV_WND_SIZE	(PKTBUFSRX * TCP_MSS)
+#if PKTBUFSRX != 0
+  #define TCP_RCV_WND_SIZE	(PKTBUFSRX * TCP_MSS)
+#else
+  #define TCP_RCV_WND_SIZE	(4 * TCP_MSS)
+#endif
 
 #define TCP_PACKET_OK		0
 #define TCP_PACKET_DROP		1